For crystal sodium chloride, state (i) the type of lattice in which it crystallises. (ii) co-ordination number of each sodium ion and chloride ion in

Question

For crystal sodium chloride, state (i) the type of lattice in which it crystallises. (ii) co-ordination number of each sodium ion and chloride ion in

For crystal sodium chloride, state
(i) the type of lattice in which it crystallises.
(ii) co-ordination number of each sodium ion and chloride ion in the crystal lattice.
(iii) number of sodium and chloride ions present in a unit cell of sodium chloride.
(iv) the structural arrangement of sodium chloride crystals.

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

(i) Sodium chloride crystallises in expanded face centred cubic arrangement also known as cubic close packed arrangement.
(ii) Co-ordination number of `Na^(+)` and `Cl^(-)` ions are in the ratio `6:6`.
(iii) Unit cell of NaCl has four `Na^(+)` and four `Cl^(-)` ions.
(iv) The structural arrangement of sodium chloride crystals is octahedral.